package cn.gan.loveofsoul.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @author Gwh 2022/12/08 15:18
 * @DESCRIPTION
 */
@Configuration
@EnableAsync
public class AsyncConfiguration {
    /**
     * 声明一个线程池
     *
     * @return 执行器
     */
    @Bean("threadPoolExecutor")
    public ThreadPoolExecutor threadPoolExecutor() {
        ThreadPoolExecutor executor = new ThreadPoolExecutor(5,5,5L, TimeUnit.SECONDS,new ArrayBlockingQueue<>(65536));
        //配置拒绝策略，线程池对拒绝任务(无线程可用)的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());//配置拒绝策略

        return executor;
    }

    @Bean("threadPoolTaskExecutor")
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //通过Runtime方法来获取当前服务器cpu内核，根据cpu内核来创建核心线程数和最大线程数
        int threadCount = Runtime.getRuntime().availableProcessors();
        //核心线程数5：线程池创建时候初始化的线程数（核心线程数最大不超过）
        executor.setCorePoolSize(5);
        //最大线程数5：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        executor.setMaxPoolSize(5);
        //缓冲队列500：用来缓冲执行任务的队列
        executor.setQueueCapacity(500);
        //允许线程的空闲时间60秒：当超过了核心线程出之外的线程在空闲时间到达之后会被销毁
        executor.setKeepAliveSeconds(60);
        //线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        executor.setThreadNamePrefix("async01-");
        //配置拒绝策略，线程池对拒绝任务(无线程可用)的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());//配置拒绝策略
        executor.initialize();
        return executor;
    }
}
